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[Generator Iterator] [random]
by Andy Tompkins 24 Oct '08

24 Oct '08

I am trying to use boost::generator_iterator with a random number generator as follows: --- #include <boost/generator_iterator.hpp> #include <boost/random/mersenne_twister.hpp> class my_generator {...}; my_generator gen; boost::generator_iterator<my_generator> first(&gen); boost::generator_iterator<my_generator> last; boost::random::mt19937 rng; rng.seed(first, last); --- Sadly the default constructor of generator_iterator leaves m_gen uninitialized and the seed function is trying to compare first with last. I could pass gen to last, ie. boost::generator_iterator<my_generator> last(&gen), but then if ever begin has the same value as end, it will stop. The documentation for generator_iterator says that it models an input iterator, and I assume that an input iterator is ok to use with the seed function. I'm not sure what can/should be done. Thanks in advance, Andy.

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[filesystem] file monitoring
by Carlos Rafael Giani 24 Oct '08

24 Oct '08

Hi, is a file monitor feature planned for boost.filesystem? I have been looking for a platform independent solution, but there is none (except in toolkits like Qt). Also, so far only inotify (a subsystem in the Linux kernel) can tell me when a file is closed after writing, which is absolutely necessary when watching a plugins/ directory, for example (you don't want to touch the plugins when they're only halfway copied). Several tools watch the plugin directory, but don't care if the plugins are being written or are fully there already. This can lead to instabilities. I think it is only logical to add this to boost.filesystem, something like set_monitor_callback(pathname, function_object); any thoughts?

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[function] function.hpp lacks include guard
by Okko Willeboordse 24 Oct '08

24 Oct '08

Hello, My co-worker Bob Praster found, using PC-Lint 9.0, that function.hpp doesn't have an include guard like; #ifndef BOOST_FUNCTION_HPP #define BOOST_FUNCTION_HPP ... #endif // BOOST_FUNCTION_HPP Kind regards, Okko Willeboordse

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[boost.org] people not updated?
by Thorsten Ottosen 24 Oct '08

24 Oct '08

Hi, It seems like we are missing some of our recent members. -Thorsten

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[asio] HTTPS async_read() question
by Gregory Dai 24 Oct '08

24 Oct '08

I'm playing with the following SSL client example against an https site: http://www.boost.org/doc/libs/1_36_0/doc/html/boost_asio/example/ssl/client… I replaced std::cout << "Enter message: " with the part of the URL corresponding to an HTTP GET request, and changed the handle_read() to void handle_read(const boost::system::error_code& error, size_t bytes_transferred) { if (!error) { std::cout << "Reply: "; std::cout.write(reply_, bytes_transferred); std::cout << "\n"; boost::asio::async_read(socket_, boost::asio::buffer(reply_, bytes_transferred), boost::bind(&client::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } else { std::cout << "Read failed: " << error << "\n"; } } so that it goes back to read more data. I'm able to get more than 20k data in response, but unable to reach the end of the data stream as the browser can. What could be a good reason for this behavior? Thanks, Greg

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Re: [boost] [1.37.0][serialization] Assertion failed at libs/serialization/src/extended_type_info.cpp:92
by Hartmut Kaiser 24 Oct '08

24 Oct '08

Robert, Would it be possible to get an answer to my initial questions, please? Thanks! Regards Hartmut > Anything I can do about this? > What does this assertion mean? > > My setup: Linux 64Bit, gcc 4.2.4, serialization is used for polymorphic > objects loaded from different shared libraries, shared libraries are > loaded with dlopen(RTLD_GLOBAL|RTLD_LAZY). > > Assertion (extended_type_info.cpp:92) occurs during program termination > (after main returned), during dlclose(). > > If anything else isn't possible, would it be appropriate to change the > related code (before the release!) from: > > assert(start != end); > > // remove entry in map which corresponds to this type > do{ > if(this == *start) > x.erase(start++); > else > ++start; > }while(start != end); > > To: > > assert(start != end); > > // remove entry in map which corresponds to this type > while(start != end) { > if(this == *start) > x.erase(start++); > else > ++start; > } > > Which wouldn't remove the problem, but at least avoids hanging the > program if assertions are off... > > Regards Hartmut

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[release management] Drop .gz and .zip release packaging?
by Beman Dawes 23 Oct '08

23 Oct '08

Boost releases are currently packaged four ways. With CR/NL line endings: boost_1_37_0_beta1.7z 27,340,204 boost_1_37_0_beta1.zip 57,017,457 With NL line endings: boost_1_37_0_beta1.tar.bz2 29,494,538 boost_1_37_0_beta1.tar.gz 36,436,716 I'd like to drop the .zip and .gz packages, starting with release 1.38.0. The primary motivation is a personal one; as release manager I do a lot of FTP transfers and would like to spend less time waiting for the big .zip and .gz packages to upload/download. The problem I see is that CR/NL users still download .zip files twice as often as .7z, and NL users still download about as many .gz packages as bz2. Comments? --Beman

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[1.37] Showstopper? Documentation pdf build broken.
by John Maddock 23 Oct '08

23 Oct '08

Generation of pdf's from the docbook source appears to be terminally broken at present, for example: fop.render.pdf ..\..\..\bin.v2\libs\config\doc\msvc-8.0\debug\threading-multi\config.pdf (document [system-id file:/c:/data/boost/boost/trunk/libs/config/doc/../../../bin.v2/libs/config/doc/msvc-8.0/debug/threading-multi/config.fo] (validate [error] Element 'fo:inline' cannot be a child of 'fo:flow'. Only block-level elements are permitted in this context. [validation total: 1 error] Parse error: Invalid XSL FO source 'file:/c:/data/boost/boost/trunk/libs/config/doc/../../../bin.v2/libs/config/doc/msvc-8.0/debug/threading-multi/config.fo': 1 error found during validation The problem occurs with both FOP and XEP as the FO translator BTW. Anyone know where to look for the problem? John.

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[1.37] Fixing doc typos in the beta.
by John Maddock 23 Oct '08

23 Oct '08

Someone's just emailed me regarding a doc typo in Boost.Regex. Is this the sort of QA issue that should be fixed between the beta and release? If so what criteria and procedure should we be applying? Cheers, John.

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[pool] doubling algorithm
by Boris 23 Oct '08

23 Oct '08

Are there any plans to make the pool's doubling algorithm configurable? It would be great if it was possible for example to set an upper limit or to use constant chunk sizes (thus no algorithm at all). If there are no plans may I propose then some patches? I ask as I need to configure the pool as it eats too much memory sometimes. Boris

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